Drier



April 1, 1924.

J. O. TENSFELDT DRIER Filed July 14 1922 awwutoz Patented Apr. 11, 192%STATES DRIER.

Application filed July 14, 1922. Serial No. 575,014.

To all whom it may concern:

Be it known that I, JOHN O. TENSFELDT, a citizen of the United States,residing at Ridgefield, in the county of Bergen and State of New Jersey,have invented a new and useful Drier, of which the following is aspecification.

This invention relates to drying machines; and has for its object toprovide a drying machine in which the air will be dried, heatedefliciently, and circulated efiiciently over the material to be dried.

The invention is illustrated in the accompanying drawing, in which- Fig.1, is a plan View of a drier constructed in accordance with myinvention-a part being broken away;

Fig. 2, is an elevation of the samethe central part being in section, onthe line 2-2 of Fig. 1; and,

Fig. 3, is a fragmentary view, of a transverse section of the 'drier, ason the line 33 of Fig. 1.

In the drawing, like numerals of reference refer to the same part ineach of the views.

In the practice of my invention I provide a drier, which maybe composedof any number of sections, as 5, 6, and 7, through which may pass acarrier 8, preferably composed of a plurality of strips 9, having theintervening spaces 10, provided with the perforations 11, for the readypassage of air. Any number of doors, or panels, as 12, may be providedto close the drying chamber, and provide means for the easy inspectionof the material being dried, as will be readily understood.

Within each of the parts, or sections 5, 6, and 7, are mounted aplurality of elongated gas burners 13, each of which is provided with aplurality of downwardly-inclined perforations 14 so that the burning gasescaping therefrom will be directed downwardly, and against the sides ofthe U- shaped casings 15, each of which is provided with a plurality ofperforations 16 in the bottom thereof.

The burners 13 may be supplied with a common gas pipe 17; and each ispreferably provided with an air mixer 18.

Over each gas burner 13 I mount a plurality of flue tubes 19, each ofwhich coinmunicates with a transverse tube 20, in communication withsimilar flue tubes in the same section through tubes 21; and a tube 22,may be used to connect the tubes 20 in one section with the tubes 20 inthe next sec-- tion. A baflie plate 23 may be used in each section todirect the air entering from the blower 24 through the pipe 25; andbeneath the carrier 8, I provide a chamber 26, provided With a pluralityof perforations 27, in addition to the perforations 11, so that air canreadily enter this chamber after passing over the material being dried;and in communication with this chamber is a tube 28, in which may bemounted a drying cartridge 29 (comprising any well known moisture,"absorbing chemical), through which the air from the chamber 26 must passbeforereaching again the blower, or fan 24, as will be understood.

In operation, the material to be dried is placed on the carrier .8, andpasses through the several sections. It will be understood that at thistime, gas is being burned in each of the gas burners 13, while beneatheach burner is secured a netting 30, so that any material on the carriercan not possibly come into contact with any of the gas flames; while thenetting will readily allow any radiant heat from each gas flame reachingthe material on the carrier, in addition to the heating of the airaround the tubes above, entering through the perforations 16,

in the U-shaped casings 15. Air is forced into the drier by the fan, orblower 24, through the tubes 25; and travels along the space 31, abovethe baffle plates 23, as indicated with the arrows. It will be notedthat the haflie plates are shorter than the respective sections, so thatair can pass downward through the spaces 32, to circulate around thetubes 19, 20, 21, and 22, where it is heated not only from the gasburners 13, but also by the radiation. of heat from the flue tubes, aswill be readily understood, before passing through the perforations 16,in the U-shaped casings-which are so constructed that the air will bespread out over the material being dried, as indicated with the arrows33. After passing over this material the air will pass through theperforations 11, and 27, into the chamber 26, and from thence throughthe drying cartridge 29, and tube 28, to the blower 24, where it will beagain forced into the'drier, so that any heat remaining in this air willnot be lost as it is utilized over again in drying the material passingthrough the device, as will be clear.

lit will be observed that the air delivery tube is constructed so as todeliver air through ports, as 34, directed in a manner to deliver theair in the direction it has to travel so it will go in a straight line,as indicated with the arrows, through the several sections of that end.The gases of combustion pass through the several flue tubes till itreaches the discharge pipe 35, and passes from thence through the fine36.

It will thus be seen that it have provided a drier in which the dryingheat is applied to the air after the air has entered the drier andbefore it enters the drying chamber. Provision is also made to preventthe material being dried from coming into contact with the gas flamewhile providing means for the heat from the burning gas reaching thematerial being dried.

It will be seen that by the system shown the air is heated veryeiiiciently, and applied to the material on the carrier in a veryefficient manner by reason of the pockets, or U-shaped parts in thefloor of the heating chamberwhich parts project below the burnersthereby providing a great expanse of heating surface for the gas flamesfrom the burners; and the eflicient heating of the air entering thechamber above the drying chamber before the same is passed into thedrying chamber,

The construction of the receiving chamber for the air after the same haspassed through the drying chamber offers a very eiiicient means forconserving the heated air and passing it again into the drying chamber,as well as the efficient manner in applying the air to the materialbeing dried. The entire construction in combination with the means forextracting the moisture from the air before it again reaches the fan, orblower, and is again passed into the-heating chamber, is very eflicientand desirable.

I claim:

1; A drier comprising a drying chamber, a heating device including aburner mounted in the upper part of said drying chamber, means to passmaterial to be dried through said drying chamber,'and means to preventthe material being dried coming into contact with the flame from saidburner comprising a screen mounted between the drying chamber and saidflame.

2. lin a drier having a drying chamber and means to pass material to bedried through said drying chamber, a'heating device mounted in the upperpart of said drying chamber, a device adapted to apply heat to thematerial passing through said drying chamber, said device having an openflame burner as a component part thereof, and a screen interposedbetween said burner and the material being dried.

3. A drier comprising a drying chamber, means to pass material to bedried through reassess said chamber, a gas burner mounted above thematerial being dried, flues positioned to carry off the gases ofcombustion, and means to pass the air entering the drying chamber oversaid flue tubes and also apply heat directly from the gas burner to theair en tering said drying chamber.

4*. A drier comprising a drying chamber, means to pass material to bedried through said chamber, means to circulate air through said chamber,a heater located in the upper part of said drying chamber adapted toapply heat to the circulating air, said heater being adapted to applyheat also directly to the material being dried, and means to dry thecirculating air 5. A drier comprising a drying chamber, means tocirculate air through said chamber, means to pass material to be driedthrough said chamber, a chamber mounted above said drying chamberforming a heating chamber, flue tubes and baffle plates mounted in saidheating chamber, means to circulate air through said heating chamberprior to its entrance into said drying chamber, and means to apply heatto the air in said heating chamber.

6. A. drier comprising a drying chamber, means to pass material to bedried through said chamber, means to circulate air throug said chamber,a chamber mounted above said chamber forming a heating chamber, means tocirculate air through said heating chamber prior to its entrance intosaid drying chamber, means to apply heat to the air in said heatingchamber, and a plurality of pockets forming a part of said heatingchamber.

7. A drier comprising a drying chamber, means to pass material to bedried therethrough, means to circulate air through said drying chamber,a chamber above said drying chamber, and provided with a plurality ofperforated pockets adapted to deliver air onto the material being driedin said drying chamber, means to circulate air through said upperchamber prior to its entrance into the drying chamber, and means toapply heat to the air in the upper chamber and also to the air in thedrying chamber.

8. In a drier provided with a drying chamber and means to pass materialbeing dried through said drying chamber, a heating chamber above saiddrying chamber provided with a plurality of pockets, means to circulateair through said heating chamber and said pockets, and means to applyheat to the air in said heating chamber and in said pockets.

9. The herein described drier comprising a drying chamber, a carrierpassing through said chamber composed of a plurality of strips, aheating chamber located beneath said drying chamber provided with aplurality of perforations adapted to receive the air after passingthrough said drying chamber, a. ing chamber-the floor of said heatingchamheating chamber mounted above said dryher being provided with aplurality of ing chamber, a plurality of gas burners pockets providedwith perforations, and 1 adapted to heat the air in said heating meansto pass air through said chambers.

5 chamber, a plurality of gas flues passing Dated this 11th day of July,1922.

from said burners through said heating chamber, baflie plates mounted insaid heat- JOHN O. TEN SFELDT.

